Installing Rails: “File not found: lib” [duplicate]

Answer 1

Ubuntu 11.10, ruby 1.9.3p125, gem ruby 1.9.3p125

gem install rdoc
gem install rails

Answer 2

I had the same problem. I kept receiving the following error message:

$ sudo gem install rails
Successfully installed rails-3.0.7
1 gem installed
Installing ri documentation for rails-3.0.7...
File not found: lib

After a lot of messing around reinstalling ruby and googling for answers I finally came across Amin Ariana's answer, upon which I ran sudo mkdir /var/lib/gems/1.8/gems/rails-3.0.7/lib/.

Success! Everything now works as expected:

$ sudo gem install rails
Successfully installed rails-3.0.7
1 gem installed
Installing ri documentation for rails-3.0.7...
Installing RDoc documentation for rails-3.0.7...

According to a similar StackOverflow answer, running sudo gem install rdoc has the same effect.

NOTE: To actually run rails after installing via gem rather than apt, you'll need to add the gem library to your path in your ~/.bashrc: /var/lib/gems/1.8/bin

Answer 3

As I understand it, the actual issue lies within rubygems:

https://github.com/rails/rails/issues/1958

https://github.com/rails/rails/commit/e7fc5d1cad27e47d3d0149a2b9a61d074c30f225

The default s.require_paths is, in as far as I can tell by the commit to fix the issue, [lib] rather than []. So you end up with lib not found errors whenever you install a gem without such a folder.

Rails in particular, but not only.

Answer 4

I had the exact same problem. I tried the other solution suggested here and that didn´t work for me on Ubuntu.

Here is the solution:

Ubuntu

mkdir /lib/ruby/gems/1.8/gems/rails-{whatever your version is}/lib

Depending on which combination of environment versions you're using, some users have given the feedback that this works for them instead:

mkdir /var/lib/gems/1.8/gems/rails-{whatever your version is}/lib

Basically, the ¨[sudo] gem install rails¨ command expects the /lib folder (at the end) but for some reason it hasn´t been created yet.

If you're not sure what your rails version is for the part where I say {whatever your version is}, type up to "rails-" and then try hitting the tab button. You're on a Linux system, so it'll give you a suggestion or two. If it doesn't, try the alternative line given above. You'll need some try and error here because the directory structure is slightly varied in different versions of rails, it seems.

The source of this solution was the following URL. Hope it helps!

http://www.spritle.com/blogs/?p=915

Mac OS X

If you're having a similar problem on Mac OS X, take a look at this other post as well. Sounds like your work-around is simpler:

Ruby on Rails Beta 3 Install Problem on Snow Leopard

Answer 5

# sudo gem install rdoc
# sudo gem install rdoc-data
# sudo vim /var/lib/gems/1.8/gems/rdoc-data-2.5.3/bin/rdoc-data

rdoc-data version 2.5.3 is depend on your version. My Marveric ruby path is /usr/bin/ruby, But my rdoc-data ruby path wasn't. Then I change it.

EDIT/

#!/usr/bin/ruby -w

require 'rubygems'
require 'rdoc/data'

RDoc::Data.run

/EDIT

# sudo /var/lib/gems/1.8/gems/rdoc-data-2.5.3/bin/rdoc-data --install
# sudo gem rdoc --all --overwrite
# sudo mkdir -p /var/lib/gems/1.8/gems/rails-3.0.6/lib
# sudo gem rails

Good luck!

Answer 6

Google has lots of information about this error. You can read this or this..or browse more

EDIT

Found these on Stackoverflow itself: rails 3 install error "File not found: lib" and the original one: Ruby on Rails Beta 3 Install Problem on Snow Leopard

To summarize you need to run gem install rdoc before.

It might solve your problem!